In-Cell NMR (IMAGE) International Union of Crystallography Caption (a) Proteins (green) can be endogenously expressed and isotopically labelled in bacteria (b) Exogenous proteins (blue) can be delivered to X. Credit Enrico Luchinat and Lucia Banci Usage Restrictions None License Licensed content Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.